Electric signaling device.



C. BRANDON.

ELECRIG SIGNALING DEVICE.

APPLICATION FILED FEB. 3. IBIS.

Patented De@ Hf, Ql.

ramener amica.

GARL'BRANDOIEI', 0F INDIANAPOLIS, INDIANA.

ELECTRIC SIGNALING DEVICE.

Application filed. February 3, 1915.

by the introduction of a thermostat for opening and closing the electric circuits.

The present invention is particularly applicable to be used for indicating the temperature, within prescribed limits, of water used in the circulating systems or" niotor cars, whereby injury to parts of the device with which the water comes into contact may be prevented, in case the temperature of the water rises too high or falls too low. The object of the invention is to provide an electric signaling device of the above character which will indicate by signal or alarm 'when the temperature of water, when the latter is employed as a cooling medium for internal combustion engines, rises above or falls belowarbitrarily fixed standards of safety, thereby decreasing the liability of injury of the parts.

Referring to the accompanying drawings,

forming a part hereof, the figure illustrates a diagrammatic view of my improved signaling device.

Referring' to the drawing, the signaling, device embraces'thee separate and distinct divisions,` which, for convenience, will be termed, first, the primary circuit, second, secondary circuit and third, auxiliary circuit.

Then the signaling device is vused in connection with a motor car to indicate when the temperature of the water employed in the circulating systems therein rises above or falls below fixed standards of safety, a warning is sounded through the closing of certain. electric circuits, so that the parts of the motor cai' that contines the water will not' be injured, by means of the introduction of a thermostat l0, the latter being inserted into the water within. the radiator, not shown. The thermostat is arranged within the primary circuit comprising the conductor wires 1l, 12, 13 and ,14, the lower'por- Specicatioii. of Letters Patent.

'f signal 25 to be sounded.

tremely cold weather.

Patented Dealer, i915. Serial No. 5,898.

tion 15 of the coil, the conductor lwire 16 and battery 17. wires 13 and lai. are brought into direct contact with the column of mercury Within the thermostat l0 near the bulb l0a so that under normal" conditions the mercury Will maintain a closed circuit within the primary circuit of the signaling device. In case the temperature of the water slioukbfall suffi,

ciently to cause the column` of mercury to open or break the primary circuit, the contact arni 20, which is magnetically held against the pole piece will drop and contact the wire 21, thereby closing the circuit through the conductor wires 11 and 12 of a. priniarycircuit, and conductoi wires 23, 22 and 21 of the auxiliary circuit, causing the if theteniperature of the water increases sui"- ticiently to cause the column of mercury to rise and contact theend of the conductor wire 30 a. circuit will be established through conductor wires l1, 12 and 13 of the primary circuit, and conductor wire 30, upper portion 31 of the coil and conductor wire 16 of the secondary circuit and battery 17, and as a constant current is normally maintained through the priinary'circuit, as heretofore stated, both ends of the coil will receive a current of like value which, through the reverse winding of the two halves of the coil, causing the current to be neutralized will cause deniagnetization of the coil, thereby allowing the arm 20 to drop and contact conductor wire 2l. This actionof the arm 2O will close the circuit through the conductor wires 11 and 12 of the primary circuit and wires 23, 22 and 21 The ends of the conductor On the other hand,

is normally closed, on account of the fact that sufficient heat will be generated when the engine is running tol impart the necessary temperature to the water for maintaining the column of mercury above tlie'ends of the conductor wires 13 and 11i, and the p mercury will only fall below the ends of said wires in case the engine reniains idle for an indefinite period of time during excircuit normally closed the operator may, at will, sound the alarm by closing the circuit through the conductor wires 11 and l2 of the primary circuit, and wires 23, 22 and 2l `With the primary of the auxiliary circuit, by means of the switch which, on a motor car, is conveniently located on the steering wheel.

The electric signaling device herein described is also provided' with a double-pole switch 40 whereby the electric circuit may be tempo arily suspended. This may be desirable when placing the c ar in storage for an indefinite period of time.

It will be noted that by means .of the hereinabove described signaling device warning is given when the temperature of the water has reached a maximum or minimum point of safety, so that an opportunity is afforded to remedy the situation before the apparatus is injured on which the signaling device is employed.

Having thus fully described my said invention, what I desire to secure by Letters Patent, is#

l. In a device for the purpose specified, an elec-tric circuit, a source of current, a signaling device in said circuit, an armature in said circuit7 an electro-magnet attracting the armature to break said circuit, a circuit connected with said first circuit between the source of current and armature to energize the magnet, a thermostat having a column. oi mercury in said last circuit adapted to break the circuit and demagnetize thev electro-magnet at a predetermined low temperature, a current conductor connecting the thermostat column at a predetermined high temperature with the electro-magnet to neutralize the magnetic action of the latter7 whereby, in either euse, the armature will be released at predetermined low or high temperatures, and the first circuit thereby closed to operate the signal.

2. In a device for the purpose specified, an electric circuit, a source of current and a signaling device in said circuit, a manually operated switch also in the circuit, a circuit extension, an armature in said circuit extension, a circuit connected with said irst circuit to energize the electro-magnet, a thermostat having a column of mercury in said last circuit adapted to break the circuit and demagnetize the electro-magnet at a` predetermined low temperature, a current conductor connecting,T the thermostat column at a predetermined high ten'iperature with the electro-magnet to neutralize the magnetic action of the latter, whereby, in either case the armature will be released at predetermined low or high temperatures, and the first circuit thereby closed to operate the signal.

In witness whereof, I have hereunto set my hand and seal at Indianapolis, Indiana, this 30th day of January, A. D. one thousand nine hundred and fifteen.

CARL BRANDON.

Witnesses l". W. Wonnnnn, J. A. MINTURN. 

